from a person who goes "oh shit!" when either his wall is approached quickly or even when 10% of his wall is eaten immediately when he expected it to take all day and he then pulls the wall from existence"

For example, a big buyer wants to initiate a large position, but in this market, his buy order would easily move the Bitcoin price to $16 or more. So he uses his coins to create a fake wall at $15.72, it's a rather safe price that won't be reached in a hurry, but it puts up a barrier so all the sellers who wanted to sell at $16, will now sell below $15.72, because they think no way this 11000 wall is going to be eaten any time soon. So this big buyer gets to buy coins below $15.72, instead of buying at $16+

For example, a big buyer wants to initiate a large position, but in this market, his buy order would easily move the Bitcoin price to $16 or more. So he uses his coins to create a fake wall at $15.72, it's a rather safe price that won't be reached in a hurry, but it puts up a barrier so all the sellers who wanted to sell at $16, will now sell below $15.72, because they think no way this 11000 wall is going to be eaten any time soon. So this big buyer gets to buy coins below $15.72, instead of buying at $16+

He can also do this off exchange. As MTGOX is the defacto "price", if someone can successfully manipulate it, he can make cheap deals off exchange without the need to risk upsetting the price on mtgox itself. I have a suspicion this is what was happening for the last month or so....

For example, a big buyer wants to initiate a large position, but in this market, his buy order would easily move the Bitcoin price to $16 or more. So he uses his coins to create a fake wall at $15.72, it's a rather safe price that won't be reached in a hurry, but it puts up a barrier so all the sellers who wanted to sell at $16, will now sell below $15.72, because they think no way this 11000 wall is going to be eaten any time soon. So this big buyer gets to buy coins below $15.72, instead of buying at $16+

For example, a big buyer wants to initiate a large position, but in this market, his buy order would easily move the Bitcoin price to $16 or more. So he uses his coins to create a fake wall at $15.72, it's a rather safe price that won't be reached in a hurry, but it puts up a barrier so all the sellers who wanted to sell at $16, will now sell below $15.72, because they think no way this 11000 wall is going to be eaten any time soon. So this big buyer gets to buy coins below $15.72, instead of buying at $16+

Oh so it's a fake sell so mr money bags can safely buy BTC?

its far from safe, but yeah it manipulates some times.

He got away this time, but soon enough someone is going to eat his lunch (that person might be me in a few months)